#include<iostream>
#include<cstdio>
#include<algorithm>
#include<queue>
#define ll long
#define For(i,x,j)  for(ll (i)=(x);(i)<=(j);++(i))
using namespace std;
inline ll rea(){
	ll t=1,c=0;char x=getchar();
	while(x<'0'||x>'9'){
		if(x=='-')	t=-1;
		x=getchar();
	}
	while(x>='0'&&x<='9'){
		c=c*10+x-'0';
		x=getchar();
	}return t*c;
}
ll n,ans;
int main(){
//	freopen(".in","r",stdin);
//	freopen(".out","w",stdout);
	n=rea();
	return 0;
}

